PS C:\Users\edwils> notepad
PS C:\Users\edwils> Get-Process note*

Handles  NPM(K)    PM(K)      WS(K) VM(M)   CPU(s)     Id ProcessName                                                  
-------  ------    -----      ----- -----   ------     -- -----------                                                  
     45       2     1044       3904    53     0.03   3052 notepad                                                      
     45       2     1136       4020    54     0.05   3140 notepad                                                      


PS C:\Users\edwils> Stop-Process -processName notepad -WhatIf
What if: Performing operation "Stop-Process" on Target "notepad (3052)".
What if: Performing operation "Stop-Process" on Target "notepad (3140)".

PS C:\Users\edwils> Stop-Process -processName n* -WhatIf
What if: Performing operation "Stop-Process" on Target "notepad (3052)".
What if: Performing operation "Stop-Process" on Target "notepad (3140)".